Hemoglobinometer.



E. KBNER & P. FRITZSUHING.

HEMoGLoBINoMBTER. APPLICATION FILED DBG 11, 1911 l`Y| ,()83,934 Patented 'Jan 13, 1914.

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EDIlARD KBNR AND-PAUL FRITZSCHING. OF MANNHEIM. GERMANY, ASSIGNORS T0 C. F,BOEHRINGER & SOEHNE. OF MANNHEIM-WALDHOF. GERMANY, A. FIRM.

y HEMOGLOBINOMETER.

Specification of'Lett-ers Patent.

Application filed December 11.1911'. Serial No. 665,118.

'Patented Jan. .13, 1914.

'o all lWhom. it my concern.'

llc it known that we., Emmen Knnen and P.i'ifi. liarizscnnvo, subjects of the German Emperor, residing at Mannheim, in the Grand Duchy of linden. Germany. havel invented certain new and use-ful improvements in llemoglobinometers, ot' which .the following' is a specification.

This invention relates to certain new and useful improvements in hemoglobinometers, such as are used for testing the blood. and more particularly for determining the percentage of hemoglobin inthe blood.

' The invention has for its main object, to provide a device of this character of ay neat same beingused immediately when the Vpatient is being examined and independent-ly of a dark room, a special source of light, or other specialcircumstances.

still further object of our invention is to provide a device of this `character embodying the colorimetric system in which the'diitcri-a'it shades of the color are arranged on a rotatable disk provided with a perforar-'r tion through each field of color and in which tering or blotting paper carrying the blood sample, the device also having means for conveniently cariving the filtering or blotting paper used. li`urthermore.r to provide a device of this character embodying an inclosing case which acts to exclude all foreign matter from the filtering .or blotting paper and also to exclude light from the varicolord percentage disk.

The invention consists in the novel con'- struction, combination and arrangement of, parts which will be hereinafter more fully?. described and then particularly claimed, and in describing the invention in detail, refer: ence will be had to the accompanying drawing forming a part of this application and employed'to indicate' like parts throughout the diiferent views of t-he drawing, in which Figure 1 is a view in front elevation showing the instrument with the paper-carrying section of the inclosingV casing removed. Fig. 2 is a similar view of the paper-carrying section of the casing. Fig. 3 is a de`- tached view in elevation of the colorimetric disk. F ig. 4 is a transverse vertical secf tional view with the two sect-ions of the intion ot the disk-carrying section of the casing.

lo put our invention into practice, we provide a circular box or casing which coinpriscs two separable members or sections. and which in practice are generally niade of card board or similar material, though of courseI we do not confine ourselvesl to any specitic material. The main member or section oi' this box or casing comprises a back l() with a circular Wall 11 on its front face slightly less in diameter than the diameter ofthe back, the other of said members or sections being in the. nature of a lid and comprising a cover plate 19 having an annular iarigelfl of a diameter to fitI neatly over the Wall 11, the relative width of the. wall ll and flange 14 being such that when the sections or members are placed together. thefree'edge of the flange 14 will abut against the back l0 outside of the wall 1l, and' the free edge ot.' the wall ll will abut against the inner face of thc lid or cover l2. At a point in its periphery, such point. being herein designated as being at the top, the wall ll is provided on itsv inner edge with a. cut-away portion or "slot 15', fora purpose as will hereinafter more fully appear. It is desirable. though not essential, that therinne'r face of the back 10 be provided with a facing 16 which may be of a stiifmaterial to add rigidity to the back.A

and may be colored darkly so as to present no light surfaces adjacent the color card. This backing, in case the back 10 be ot a dark color, may obviously be dispensed with. Where employed, however, it will be cut away at its top edge as shown in Fig. 4 at 16,rso as not to interfere Wit-h the insertion lthrough the slot 15 and in front of the backing, of the filtering or blotting paper carrying the sample of blood, and to be hereinafter more fully referred to.

Fitted `within the main member or section of lthe box or caing is a face plat-e 17, the inner face of which rests at its edges against the stop 18 provided Within the main `section of the box or casing, and which face plate at.its upper side has a substantially V-shaped or sector-shaped cut-away portion 19 extending inwardly from the periphery thereof to'a point in close proximity to the axis of the plate. This face plate carries lll miilllully. tliereof" a pinth` 20, orequivalent device, which rotates .in the tace plate and carries on its inner-end thel color d1sk21, which disk is of slightly less diameter than 5 the face plate, so asto freely rotate within the wall ll. The said pintle may be of any desired form, such as will fasten the color disk so that it .will rotate as the pintle is rofated, such pintle being provided on its outer end with a suitable gripping -member 22 herein shown as being in the form of a small ring, since such device when not in use, will lie fiat against the face plate 17. The pintle here shown is formed from a single piece of wire doubled upon itself and. havin@r its free endss rea-d apart after being passed through the co or card and a small disk 23, the ends of the Vintle being fastened to said disk, and the dis being .fastened to the color card, so that when the pintle is turned in the face plate, the color card and -disk will rotate with the pintle. The ldisk 2dl above referred to also acts as a seat vfor the lower end of the piece of blotting or filtering paper inserted in the ybox or casing in back of the color card. The'said color card, as stated, is in the form of a disk, and this disk is divided into equally-spaced substantiall triangular fields or sectors 24, nine of Whic l are shown, of different shades of the color of blood and indicating by the depth of color the percentugo of hemoglobin in the blood, from 20 to 100%, the remaining field of the color card 3 beino preferably left blank, so that when have found it convenient to arrangeI this f pa )er in circular pads, each sheet of the padj being perforated from the periphery to the center so as to provide sections 27 of a shape conformin `to the fields of the color card. The pad o paper designated 28 in Fig. 4 is `fastened to the lid or cover plate l2 by an eyelet 29 or any other suitable means.

Such being the construction of the device, its mannerv of use will it is believed, be obvious, but may be briefly stated as follows: When a test of the blood is to be made, the

V#physician or operator detaches one of the .sections-27 of thevfiltering or blottinoP paper, and after the desired quantity "of blbod has been absorbed thereby, such section of the paper is inserted in the slot 15\-and the operator by turning the pintle 20 brings the differentshades of color successively over the filtering or blotting paper until the matching color is observed through the proper sight opening 26. The `figures ywluch slund opposite that shade of color which nmos-t nearlycorresponds with Vthe color of said sample, give the percentage ot hemoglobin 1n the blood under examlnation.

i' I t is understood ofcourse that an examinatio-n of the quantity of hemoglobin by the i aid of a scale of colors, such as described, muy not give such exact results as may bc obtained when a hemomcteris used for the purpose, but extensivo experiments by us have proven that such exactnesis diviates but slightly from the results obtained by the use of complicated apparatus designed for the purpose of'obtaining the amount of hemoglobin in the blood.

Having, .fully described our invention what We claim as new is: t

1. In a hemoglobinometer, a box or casing comprising two separable sections, a color disk rotatably-mounted in one of the sections and having a plurality of sectors of different shades, each sector having an opening therethrough, the rim of said section being provided with a receiving-slot, the other section of sald box constituting a cover.

2. In a hemoglobinometer, a box or casing comprising two separable sections, one of which has a c1rcular Wall provided wlth a receiving openlng, a disk rotatable 1n sald section and having its outer face divided Iinto fields of different shades, said disk rovided with an opening through each eld of color, -a face plate `frictionally fitting within said wall and carrying said color disk, the other section of said box constituting a testing paper-carrier and a cover for the main section of thebox.

3. In a hemoglobinometer, a circular box or casing having a slot through the wall to receive a piece of testing paper, and a coloi` disk rotatably-mounted in the box with its router face divided into fields of different shades and having openings therethrough through which the paper inserted in said slot may'be observed.

4. In a hemoglobinometer, a circular box havingits vvall provided withl a slot at one point, and a rotatable color, disk mounted Within the box, the' color disk having its outer 'face'divided into fields of different shades and having openings through the disk within the boundaries of the fields, thrpugh lwhich paper insertedthrough the slot may be observed.

5. In a hemoglobinometer, a circulanbox provided at a point in its walls with an insertion slot, a color card rotatably-mounted within the box and having itsr outer face divided into fields of different shades and further provided with o enings therethrough Within the boundaries of the fields for observance lof material inserted through said slot, and a cover member for said box.

6. In a hemoglobinometer; a box' comprislng a lcard holding member provided with an insertion opening, a color card rotatably` mounted Within said `member and having its outer face divided into fields of different shades and further having side openings for the observation of material introduced in said box member through said insertion opening and in back of sald color card, and a cover member fitting on said card holding member to'exclude the light from said color card when the device is not in use.

7. In a hemoglobinometer, a card holding member comprising a back having an anlfnular angewof less diameter than the back,

said Harige provided with an insertion slot, a color card rotatably-mounted Within said member and having its outer face divided into fields of different shades and further havingy side openings through which ma,- terial inserted through said slot` may be observed, and a cover member comprising a front plate and a rim, the rim fitting over the flange of the back, plate and covering A. O. TITrMANN, JOSEPH PEEIFFER. 

